rapidio/tsi721: add filtered debug output

Replace "all-or-nothing" debug output with controlled debug output using functional block masks. This allows run time control of debug messages through 'dbg_level' module parameter. Signed-off-by: Alexandre Bounine <[email protected]> Cc: Matt Porter <[email protected]> Cc: Aurelien Jacquiot <[email protected]> Cc: Andre van Herk <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
bartman · Mar 22, 2016 · 72d8a0d · 72d8a0d
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diff --git a/Documentation/rapidio/tsi721.txt b/Documentation/rapidio/tsi721.txt
@@ -16,6 +16,15 @@ For inbound messages this driver uses destination ID matching to forward message
 into the corresponding message queue. Messaging callbacks are implemented to be
 fully compatible with RIONET driver (Ethernet over RapidIO messaging services).
 
+1. Module parameters:
+- 'dbg_level' - This parameter allows to control amount of debug information
+        generated by this device driver. This parameter is formed by set of
+        This parameter can be changed bit masks that correspond to the specific
+        functional block.
+        For mask definitions see 'drivers/rapidio/devices/tsi721.h'
+        This parameter can be changed dynamically.
+        Use CONFIG_RAPIDIO_DEBUG=y to enable debug output at the top level.
+
 II. Known problems
 
   None.